Fans of K-pop were delighted by a special surprise in the latest episode of Resident Playbook, aired on May 10, 2025. The episode featured a mention of BTS and a fun cameo by TXT’s Yeonjun and Soobin.
During episode 9, Kang You Seok’s character casually said, “And starting from today, she is my role model. Second only in admiration to my colleagues BTS.” The brief but meaningful reference to BTS caught the attention of many fans, who quickly shared their excitement on social media.
The real surprise came in a karaoke scene, where the show introduced a fictional idol group called HI-BOYZ. Kang You Seok’s character, Um Jae Il, performed When the Day Comes at a karaoke bar.
In the background, a music video of the song played, featuring Yeonjun and Soobin as members of HI-BOYZ. The energetic performance by the TXT duo added a fun twist to the scene.

Although only Yeonjun and Soobin appeared in the music video, the full track was recorded by all five members of TXT. The song will be released on the Resident Playbook OST on May 11, 2025, at 6 p.m. KST, and fans are already expressing their love for the track’s nostalgic vibe.
A teaser for HI-BOYZ’s full performance video was also shown at the end of the episode. The teaser’s high-quality visuals and impressive choreography have made fans excited to see more. The full video will be released on May 12, 2025, at 12 p.m. KST.
Resident Playbook continues to capture the hearts of viewers with its emotional storytelling and fun pop culture references, making it a must-watch show.